Long-Range Effects in Layered Spin Structures

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Long-Range Effects in Layered Spin Structures
Ramaz Khomeriki1,3, David Mukamel2, Stefano
Ruffo1
1)Dipartimento di Energetica S. Stecco and
CSDC, Università di Firenze, and INFN, Via S.
Marta, 3, 50139 Firenze, ITALY 2)Department
of Physics of Complex Systems, Weizmann Institute
of Science, Rehovot 76100, ISRAEL 3)Physics
Department, Tbilisi State University, 0128
Tbilisi, GEORGIA
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A B S T R A C T The layered spin structures are
studied theoretically with the aim of predicting
realistic testable effects of long range dipolar
interactions. As shown, dipolar in-teraction
between the spin layers open gaps in allowa-ble
energy versus magnetization phase diagram. The
consequences of this behavior, particularly, the
respo-nse of the system state under application
of periodical external magnetic field is
investigated.
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CLASSICAL SPIN CHAINS
L.J. de Jongh, A.R. Miedema, Adv. Phys., 23, 1,
(1974). A. Dupas, K. Le Dang, J.-P. Renard, P.
Veillet, J. Phys. C Solid State Phys., 10, 3399,
(1977).
n1 Ferromagnetic chain n2 Antiferromagnetic
chain
x
z
y
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L. Q. English, M. Sato, and A. J. Sievers, Phys.
Rev. E, 67, 024403 (2003). M. Sato, L. Q.
English, B. E. Hubbard, A. J. Sievers, J. Appl.
Phys., 10, 8676, (2002). M. Sato, A. J. Sievers,
Nature, 432, 486 (2004).
Bx 4W(1-x)gt0
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A. Dupas, K. Le Dang, J.-P. Renard, P. Veillet,
J. Phys. C Solid State Phys., 10, 3399, (1977).
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